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      Central Asia Bending Machine teaches you how to eliminate and reduce sticky materials

      CREATE_TIME:2018-12-10 VIEWS:1569
      Practice shows that grinding a little often instead of waiting for non-grinding time will not only maintain good workpiece quality, reduce the blanking force, but also prolong the life of the die more than twice. The alternate use of multiple punches of the same size in turn can make the punches have a longer cooling time before they are reused. If the workpiece has too much burr or abnormal noise during stamping, it may be that the die has been passivated. Check the punch and lower die, when the edge wear produces an arc radius of about 0.10 mm, it will be grinded. The following Central Asian bender teaches you how to eliminate and reduce the sticky material. Let's see the details.
      Soft or sticky material (such as aluminium); fine particles of sheet metal will be bonded to the surface of punch due to pressure and heat during stamping, resulting in poor punching quality. Removal of adhesives can be polished with fine asphalt, the direction of polishing should be the same as the direction of punch movement, so that the generation of further adhesives can be avoided after light. Do not use roving and other grinding, in order to avoid the punch surface is more rough, more likely to appear sticky.
      I. Central Asia Bending Machine Teaches You: The Best Die Clearance
      Central Asia Bender Suggestion: Stop using the superheated die. Programming control is used to change the die, interrupt the repeated work for a long time, or reduce the stamping frequency.
      Thinning of hard materials (such as stainless steel); check and lubricate the die holes and guide keys on the turntable, such as timely repair of injuries;
      Central Asia Bending Machine teaches you how to eliminate and reduce sticky materials
      2. Central Asia Bending Machine teaches you that timely grinding can effectively prolong the service life of the die
      1) When grinding, the punch is clamped vertically in the V-groove or fixture of the magnetic chuck of the surface grinder. The grinding amount is 0.03-0.05 mm each time, and the maximum grinding amount is generally 0.1-0.3 mm until the punch is sharp.
      Die clearance refers to the sum of the clearances on both sides of the punch when it enters the lower die. It is related to plate thickness, material quality and stamping process. Choosing appropriate die clearance can improve punching quality, reduce burrs and collapses, keep the sheet level, effectively prevent strip and prolong die life.
      3. Central Asia Bending Machine teaches you how to eliminate and reduce sticky materials
      Use special mandrel to calibrate die position and adjust deviation in time.
      The above content is for the general situation, in view of the specific types and specifications of punches and dies are different, users also need to understand and summarize experience in combination with reality, to play the best performance of the dies.
      Fourth, Central Asia Bending Machine teaches you how to prevent sheet metal deformation when punching many holes
      Frequent step stamping; by checking the situation of stamping scrap, we can determine whether the die clearance is appropriate. If the gap is too large, the scrap will have rough and undulating fracture surface and smaller bright surface. The bigger the gap is, the bigger the angle between the fracture surface and the bright surface will be. When punching, the edge will be rolled and the fracture will be formed, and even a thin edge protrusion will appear. On the contrary, if the gap is too small, the scrap will have a small angle fracture surface and a larger bright surface.
      Check the level of machine tools and readjust them when necessary.
      5. Central Asia Bending Machine teaches you to avoid cutting too narrow strip as far as possible
      When the die is used to punch the sheet whose width is less than the thickness of the sheet metal, it will bend and deform the punch due to the action of lateral force, which will make the clearance on one side too small or worn seriously, and scratch the lower die, which will damage the upper and lower dies at the same time. The surface hardening die can be grinded in the usual way. Surface hardening can reduce the wear of the die when punching stainless steel plate, but it can not prolong its service life. Proper lubrication, timely grinding and operation according to regulations are effective methods.
      Central Asia Bending Machine Shows You How to Effectively Extend the Service Life of Punch Die
      Reasonable die clearance, good stamping process and necessary plate lubrication will reduce the production of sticky materials. To prevent overheating, lubrication is usually used, which will reduce friction. If there is no lubrication or scrap rebound, the following methods can be adopted:
      Surface hardening usually uses Ti plating, nitriding and other methods. Its surface hardening layer is a structure with a thickness of 12-60 M. It is a part of the punch matrix, not just a coating.
      2) Sintered alumina grinding wheel with hardness D~J and abrasive particle size 46~60 is the best choice for grinding high-speed steel.
      If many holes are punched in a sheet, the sheet will not remain flat due to the cumulative punching shear stress. Each punching, the material around the hole will deform downward, resulting in tensile stress on the upper surface and compressive stress on the lower surface. For a small number of punches, the effect is not obvious, but when the number of punches increases, pull and pull. The compressive stress accumulates somewhere until the material deforms.
      I believe that through the introduction above, you have a further understanding of the Central Asian bending machine to teach you how to eliminate and reduce the sticky material. I hope that the above will help you.

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